Variable-speed mechanism.



A. L. DE LEEUW.

VARIABLE SPEED MECHANISM.

APPLICATION FILED NOV. 21, 1908.

914,641.39 Patented Mar. 9, 1909.

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ADOLPI-I L. DE LEEUW, O1 HAMILTON, OHIO, ASSIG-NOR TO THE (LINL'INNATI MI'ILLING MACHINE ('OMPAN Y, 01* CINCINNATI, OHIO, A CORPORATION OF OHIO;

VARIABLErSPEED MECHANISM.

Specification of Letters Patent.

Patented March 9, 1909.

Application filed November 21, i908. Serial No. -163,834.

To all whom it may concern:

Be it known that I, [known L. DE LE-E-UW,

of Ohio, have invented certain new and useful Improvements in Yariable-Speed Mechanism, of which the followin is a speciiication. I My invention relates to a variable speed mechanism primarily of the cone and tumbler type One of the objects of my invention is to provide. a tumbler lever with means for mounting the same within its supporting frame independent of the bearings of the shaft relative to which it slides and substantially free from contact with the shaft.

Another object of my invention to provide the tumbler lever with locking ineans for rigidly locking the same'in any of its various step positions handle.

Another object of my invention is to provide a tumbler lever with elongate-d sleeve,

projections, enabling the same to be constantly supported in stationary and rigid bearings, irrespective of any position of its lateral adjustment.

The various features of my invention. are more fully set forth in'the description of the accompanying drawings, forming a part of this specification, in which Figure 1 is a front elevation of casing and 'Fig. 2 is an enlarged section on line :0, .c, Fig. 1. Fig. 3 is a detail side elevation ofthe tumbler lever. Fig. 4 is a central vertical sect-ion through Fig. l.

1 represents the frame which is attached manipulation lever.

to a machine tool, relatively to a cone of.

gears 2, fixed to a shaft 3 suitably journaled within the machine tool frame, or-otherwise, as the case may be to which my invention is applied.

1, 5, represent bearing plates f xed to frame 1, provided with sleeve pro ections. and within which the driving shaft 6 journals,

7 represents a pulley fixed to the shalt 6 for driving the same. The frame 1 1s pro vided with the sleeve projections 9, 10, forming bearings for the tumbler lever sleeve 11.

12 represents a sleeve plate, fired to the sleeve 11, forming a leverpro ect on for shifting the sleeve, and tumbler gearing.

by a manipulating- 13 represents a hand wheel provided with the stem 14, a portion 15 of which is screw threadedhaving screw threaded engagement with the sleeve 12 and its free end projecting through the sleeve and adapted to engage notches 16 fornicdin the frame 1. A series of these notches are provided and arranged in step form relatively to the number of gears or steps of the cone of gears 2. The casing or frame 1 is provided with the opening 17 through which the tumbler lever 'n-ojccts and with the steps 18, according to the J'minber of gears of the cone. These steps are also preferably provided with screws 19 forming abutments againstwhich the tumbler lever is locked.

20 reprcsentsa gear splined upon shaft 6, the hub of which on'each side engages with the inwardly projecting ribs formed integral with the sleeve 11, whereby the gear is lat' erally shifted with the sleeve.

21 represents a bearing plate fixed to the periphery of the sleeve 11 forming a bearing forv the tumbler shaft 22.

23 represents the tumbler or intermediate gcarin mesh with the gear 20 and adapted to be thrown into'meshwith anyoneof the gears and locked in such position by the hand wheel 13. To mesh the tumbler gear 225 withany one of the gears of the cone 2, the hand wheel 13 is turned in a direction to release gears, after which the hand wheel'is turned tobring'the stem into engagement piththc particular notch, securely locking the tum- 1 bler lever 1n position, preventing longitud nal and rocking movement of the tumbler lever.

position which will permit of thepropcr iii-- termcsh of tumbler gear with, the. gear-syn the cone.

The screws 19 form abutmcnts against which the tumbler lever is'locked and are setto a slidablv supported in said frame, whereby tumbler lever upon each. side irrespective of 'tlilQ'POSlijlOIl to which it is shifted, thereby v preventing any through bler lev I when. clamped in position practisally forms a part of the rigid frame or casing structure with the strains entirely borne by the frame" Having described my invention, 1 claim 14-111 acone and tumbler variable speed gear mechanism, a frame, a sliding tumbler pivotally supported insaid frame, a series of abutments adapted to be engaged by the tumblerinits respectivepositions of gear intermesh, and means forclamping the tumbler against said abutments, substantially as described. I

2. in a cone and tumbler variable speed mechanism, a frame, atumbler supported in said frame having pivotal and slidingaction therein, and a manipulator for said tumbler,

. adapted to slide,'rock and lock the same in various positions, substantially as described.

3. In a cone and tumbler variable speed mechanism, a frame, a tumbler journaled in said frame, a shaft projected axially through said tumbler and substantially free from contactwith said tumbler and supported in bearings independent ofthe tumbler bearings, a gear carried by said tumbler and driven by said shaft, substantially as described.

4.111. a cone and tumbler variable speed mechanism, a frame, a tumbler supported in said frame, having pivotal and slidingeonnection therein, a manipulator for said tun bler adapted to slide, rock and lock the same l 111 various positions of gear intermesl a shaft projected axially through said tumbler and substantially free from contact with said tumbler and supported in-b'earings independent of the tumbler bearings, a gear car- I ried by said tiimbler and driven by said shaft, substantially as described.

5. in a cone and tumbler variable speed mechanism, a frame, a tumbler provided.

with an elongated axial sleeve pivotally and vided with an eloiwated axial sleeve each endirrespective of the length of movement, a shaft pro ected through are s i3 the sleeve is maintained in its bearings upon both sides of the tumbler irrespective of its sliding-action, substantially as described.

6 in a cone and tumbler variable speed gear mechanism, a frame, a sliding tumbler pivotally supported in said frame, a series of step abutment-s formed in said frameadapted to be engaged by said tumbler in its respective positions of gear intermesh, means for clamping the tumbler againstsaid abutment-s, said frame being formed with a series of notches respectively opposite said abutments adapt ed to be engaged by said clamping means, substantially as described. i

7. In a cone and tumbler variable speed mechanism, a frame, a tumbler provided with an elongated axial sleeve pivotally and slidably supported in said frame at each end irrespective of the length of sliding movement, a shaft projected throhgh said sleeve and substantially free from contact therewith and journaled in bearings independent of the tumblerbearings, a gear carried by said tumbler and driven by said shaft, subs'tantially as described.

[5. In a cone and tumbler variable speed gear mechanism, a frame, a tumbler propivot rue O" slid ally and slidably supported in said f:

l sleeve and'substantially free from co tact therewith and journaled in bearings inde pendent of the tumbler bearings, a g 7 carried by said. tumbler and driven said shaft, a series of abutmenr adapted to be on aged by the tumbler in its respective positions of gear intermesh, and means for clamping the tumbler ag; said abutments, substantiall" as diese 9. In a variable sp ed mechanism, a frame, a tumbler rock. and sliding in bear ings formed in the frame, substantially as described.

In testimony whereof, I have hereunto set my hand.

ADOLPH L. DE 'LEEUW.

Witnesses:

OLIVER B. 

